OK, I'll lift the veil on it:
It's a Danish made four cylinder 750cc overhead-camshaft Type C NIMBUS.
but as of now it's just a plan. I did have a good deal on one, but due to my own stupidity
the deal fell through, so now I'm searching for another.
I am sure you know Tormod and Klaus of the "Dumb way round" ?
http://www.kccd.no/If not, I am sure they can help out in one way or another, as they're very fond of stupid ideas like racing a Nimbus...
Cheers,
Greg